sb. seem unhappy和seem to be unhappy区别?

sb. seem unhappy和seem to be unhappy区别? seem unhappy造句 Don't be unhappy if people seem to be___ your mistakes when He seem ___(be) unhappy today.What ___(happen) to him seem to be+adj和 seem+adj 的区别? seem+形容词和seem to be there seem to be 和it seem to be的区别 sb seem to seem to be 和seem to doing分别什么含义 seem to do和seem to have done的区别 seem to do和seem that的区别 英语seem to do 和seem doing的区别